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Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 5 - Origin and Evolution of Life [Latest edition]

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Biology 12th Standard HSC for Maharashtra State Board - Shaalaa.com

Chapter 5: Origin and Evolution of Life

Exercise
Exercise [Pages 117 - 118]

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board Chapter 5 Origin and Evolution of Life Exercise [Pages 117 - 118]

Exercise | Q 1.01 | Page 117

Multiple choice question.

Who proposed that the first form of life could have come from per- existing nonliving organic molecules?

  • Alfred Wallace

  • Oparin and Haldane

  • Charles Darwin

  • Louis Pasteur

Exercise | Q 1.02 | Page 117

Multiple choice question.

The sequence of origin of life may be-

  • Organic materials- inorganic materials – Eobiont- colloidal aggregates- cell.

  • Inorganic materials – organic materials – colloidal aggregates – Eobiont- cell

  • Organic materials- inorganic materials – colloidal aggregates - cell

  • Inorganic materials- organic materials – Eobiont- colloidal aggregates - cell

Exercise | Q 1.03 | Page 117

Multiple choice question.

In Hardy - Weinberg equation, the frequency of homozygous recessive individual is represented by:

  • p2

  • pq

  • q2

  • 2pq

Exercise | Q 1.04 | Page 117

Multiple choice question.

Select the analogous organs.

  • Forelimbs of whale and bat

  • Flippers of dolphins and penguin

  • Thorn and tendrils of Bougainvillea and Cucurbita.

  • Vertebrates hearts or brains.

Exercise | Q 1.05 | Page 117

Multiple choice question.

Archaeopteryx is known as missing link because it is a fossil and share characters of both

  • Fishes and amphibians

  • Annelida and arthropoda

  • Birds and reptiles

  • Chordates and nonchordates

Exercise | Q 1.06 | Page 117

Multiple choice question.

Identify the WRONG statement regarding evolution.

  • Darwin’s variations are small and directional

  • Mutations are random and nondirectional

  • Adaptive radiations leads to divergent evolution

  • Mutations are non - random and directional

Exercise | Q 1.07 | Page 117

Multiple choice question.

Gene frequency in a population remain constant due to –

  • Mutation

  • Migration

  • Random mating

  • Non- random mating

Exercise | Q 1.08 | Page 117

Multiple choice question.

Which of the following characteristic is not shown by the ape?

  • Prognathous face

  • Tail is present

  • Chin is absent

  • Forelimbs are longer than hind limbs

Exercise | Q 1.09 | Page 117

Multiple choice question.

______ can be considered as a connecting link between ape and man.

  • Australopithecus

  • Homo habilis

  • Homo erectus

  • Neanderthal man

Exercise | Q 1.1 | Page 117

Multiple choice question.

The cranial capacity of Neanderthal man was

  • 600 cc

  • 940 cc

  • 1400 cc

  • 1600 cc

Exercise | Q 2.01 | Page 117

Very short answer question.

Define the Gene pool

Exercise | Q 2.01 | Page 117

Very short answer question.

Define the Gene frequency

Exercise | Q 2.01 | Page 117

Very short answer question.

Define Organic evolution.

Exercise | Q 2.01 | Page 117

Very short answer question.

Define Population.

Exercise | Q 2.01 | Page 117

Very short answer question.

Define Speciation.

Exercise | Q 2.02 | Page 118

Very short answer question.

What is adaptive radiation?

Exercise | Q 2.03 | Page 118

Very short answer question.

If variation occurs in a population by chance alone and not by natural selection and brings a change in frequencies of an allele. What is it called? 

Exercise | Q 2.04 | Page 118

Very short answer question.

State the Hardy – Weinberg equilibrium.

Exercise | Q 2.05 | Page 118

Very short answer question.

What are homologous organs?

Exercise | Q 2.06 | Page 118

Very short answer question.

What is vestigeal organ?

Exercise | Q 2.07 | Page 118

Very short answer question.

What is the scientific name of the modern man?

Exercise | Q 2.08 | Page 118

Very short answer question.

What is coacervate?

Exercise | Q 2.09 | Page 118

Very short answer question.

Which period is known as “age of Reptilia”?

Exercise | Q 2.1 | Page 118

Very short answer question.

Name the ancestor of human which is described as a man with an ape brain.

Exercise | Q 3.1 | Page 118

Short answer question.

Write a note on Genetic drift.

Exercise | Q 3.2 | Page 118

Short answer question.

Enlist the different factors that are responsible for changing gene frequency.

Exercise | Q 3.3 | Page 118

Short answer question.

Draw a graph to show that natural selection leads to disruptive change.

Exercise | Q 3.4 | Page 118

Short answer question.

Give the significance of fossils.

Exercise | Q 3.5 | Page 118

Short answer question.

Write the objections to Mutation theory of Hugo de Vries.

Exercise | Q 3.6 | Page 118

Short answer question.

Give an example of disrruptive selection

Exercise | Q 3.6 | Page 118

Short answer question.

What is disrruptive selection?

Exercise | Q 4 | Page 118

Match the following:

Column- I Column- II
1. August Weismann a. Mutation theory
2. Hugo de vries b. Germplasm theory
3. Charl Darwin c. Theory of acquired characters
4. Lamark d. Theory of natural selection
Exercise | Q 5.1 | Page 118

Long answer question.

Would you consider wings of butterfly and bat as homologous or analogous and why?

Exercise | Q 5.2 | Page 118

Long answer question.

What is adaptive radiation? Explain with suitable example.

Exercise | Q 5.3 | Page 118

Long answer question.

By taking industrial melanism as one example. Explain the concept of natural selection.

Exercise | Q 5.4 | Page 118

Long answer question.

Describe the Urey and Miller experiment.

Exercise | Q 5.5 | Page 118

Long answer question.

Describe the different types of reproductive isolations.

Exercise | Q 5.5 | Page 118

What is Isolation?

Exercise | Q 5.6 | Page 118

Long answer question.

Explain the different factors responsible for genetic variations.

Exercise | Q 5.6 | Page 118

What is Genetic variations?

Exercise | Q 6 | Page 118

Long answer question.

Complete the chart.

Era Dominating group
of animal
1. Cenozoic ____________
2. _________ Reptiles
3. Palaeozic ____________
4. _________ Invertebrates
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Chapter 5: Origin and Evolution of Life

Exercise
Biology 12th Standard HSC for Maharashtra State Board - Shaalaa.com

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 5 - Origin and Evolution of Life

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 5 (Origin and Evolution of Life) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Biology 12th Standard HSC for Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Biology 12th Standard HSC for Maharashtra State Board chapter 5 Origin and Evolution of Life are Origin of Life, Chemical Evolution of Life (Self-assembly Theory of the Origin of Life), Organic Evolution, Darwinism, Mutation Theory, Modern Synthetic Theory of Evolution, Mechanism of Organic Evolution, Hardy-weinberg’s Principle, Adaptive Radiation, Evidence of Organic Evolution, Speciation, Geological Time Scale, Human Evolution.

Using Balbharati 12th Board Exam solutions Origin and Evolution of Life exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board 12th Board Exam prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 5 Origin and Evolution of Life 12th Board Exam extra questions for Biology 12th Standard HSC for Maharashtra State Board and can use Shaalaa.com to keep it handy for your exam preparation

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